Backup sight



FIG. 1 is a perspective view of backup sight showing our new design;

FIG. 2 is an end view thereof;

FIG. 3 is an end view thereof, opposite that of FIG. 2;

FIG. 4 is a side view thereof;

FIG. 5 is a side view thereof, opposite that of FIG. 4;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

In the drawings, the dash-dot-dash lines depict the boundary of the claim. 

CLAIM The ornamental design for a backup sight, as shown and described. 